Improvement in coal-boring machines



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D. SHOEMAKER. Goal-Boring Machines. N0. 142,950. Patented Septemberl, 1873.

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UNITED STATES' PATENT CEEIOE.

DAvID sHOEMAHEE, or KITTANNING TOWNSHIP, AEMsTEONc. OOUNTY, AssIcNon OE ONE-HALE HIs EIGHT To G. A. HEIOHERT, Jn., OE MAN-- ORvILLE, AND JOHN HORN EEIOHEET, OE PHILADELPHIA, PA.

IMPROVEMENT IN COAL-BORING MACHINES.

Specification forming part of Letters Patent No. 142,950, dated September 16, 1873; application filed May 15, 1873.

To all whom it may concern:

Be it known that I, DAVID SHOEMAKER, of Kittannin g township,in the county of Armstrong and State of Pennsylvania, have invented new and useful Improvements in Apparatus for Boring Goal and other minerals; and I do hereby declare the following to be a clear and exact description of the nature thereof, sufficient to enable others skilled in the art to which my invention appertains to fully understand, make, and use the same, reference being had to the 1accompanying drawings making part of this specification, in which- Figure 1 is a perspective vie'w ofthe device embodying my invention. Figs. 2 and 3 are side views of portions thereof, the gearing being differently arranged. Fig. 4 is a front view of a detached portion, partly in section. Fig. 5 is a front view of the housing, the parts therewith, the front sill, and one of the holding-screws. Fig. 6 is a top view of one of the bisected nuts. Fig. 7 is an inside view thereof. Fig. S is a longitudinal section in line x a2, Fig. 5. Fig. 9 is a top view of the carriage.

Similar letters of reference indicate corre' sponding parts in the several igures.

This invention consists in a sliding carriage, which is advanced by the rotation of the bitcarrying screw, whose operatin g mechanism is mounted on said carriage. It also consists in a bisected nut for throwing the screw in and out of gear. 1t also consists in mechanism for opening and closing the parts of the nut. It also consists in the screw, its gearing, and a regulator operating upon and moving with the supporting-carriage. It also consists in means for lateral adjustment of the boring apparatus. It also consists in the construction of the sill for the attachment of the housing. It also consists in the construction `of thefcarriage and gearing, without interfering with the free movements of the former. It also consists in the construction of the various parts to permit the lateral movement of the whole apparatus.

Referring to the drawings, A represents the front sill, and A2 the rear sill, which are arranged transversely, and support the working parts of the device. B B represent two bars or rods, whichextend longitudinally, and are connected, respectively, to a support, l), on the sill A2 and a portion of a housing, E, which is arranged on the sill, suitable nuts or other fastenings P1 being provided for securing the bars in place. 0n the .bars B there is mounted a carriage, Z, which consists of a suitable frame-work, and has at its sides or corners bosses or sleeves, b b, through which Apass the bars B, longitudinal motions of the carriage being permitted on the bars. From the carriage' Z there rise standards as w,

and on the standard :v there is mounted a driving-wheel, C, which meshes with a spur-wheel d', whose shaft carries a bevelwheel, e, which gears with a similar bevelwheel, c', mounted on a longitudinally-,arranged shaft, f. This shaft has its bearings at one end in a box, f', on a corresponding part of the carriage Z, and its other end carries a toothed wheel, J which engages with a wheel, J the latter engaging with a wheel, J, both of which have their bearings on the standard x2. D represents what. I call the regulator, whose axis is on the standard m2,

and receives motion from the shaft f through the intermediate gearing J J', and J. F represents a screw-shaft, which is a continuation of the shaft f, and extends toward and through the housing E. The housing consists of a frame, preferably of metal, and is located` on the front sill A. This housing carries two sliding pieces, g g, which are cut away semicylindrically on their internalfaces, and such portions are screw-threaded to correspond to 

